We got our books and material in advance. In the We will use the blue ATPL-series by Oxford Aviation Academy. Some parts of the subjects will not yet be covered in the CPL course but I think most of the contents will become familiar. I'm actually quite horrified by the amount of stuff to learn, just got to cope with it!
So there's fourteen different books and the ones most important regarding working life are easily recognizable by their small number of pages :)

Oxford JAA ATPL -series:
Volume 1: Air Law
Volume 2: Aircraft Knowledge 1 - Airframes & Systems
Volume 3: Aircraft Knowledge 2 - Electrics & Electronics
Volume 4: Aircraft Knowledge 3 - Piston and Gas Turbine Engines
Volume 5: Aircraft Knowledge 4 - Instrumentation
Volume 6: Flight Planning 1 - Mass & Balance, Performance
Volume 7: Flight Planning 2 - Flight Planning & Monitoring
Volume 8: Human Performance
Volume 9: Meteorology
Volume 10: Navigation 1 - General Navigation
Volume 11: Navigation 2 - Radio Navigation
Volume 12: Operational Procedures
Volume 13: Principles of Flight
Volume 14: Communications